.box1{
  width: 200px;
  height: 100px;
  background: url(./../img/1.jpg) center no-repeat;
  background-size: 100% 100%;
}

.box2{
  width: 200px;
  height: 200px;
  background: url(./../img/2.jpg) center no-repeat;
  background-size: 100% 100%;
}